JPS59152811A - Metal molding and manufacture thereof - Google Patents

Abstract

PURPOSE:To make it possible to lower the cost thereby providing an inexpensive molding, by joining a strip having metallic gloss surfaces and a strip having non-gloss surfaces, folding and forming the joined strips, and covering the roughened surfaces with a resin. CONSTITUTION:For example, the metal strip 10a having metallic gloss surfaces and the metal strip 10b having non-gloss surfaces are joined along the length by welding or the like to form a strip 10', and the strip 10' is folded and formed by a group of rollers 117 of a cold rolling molder into a metal core material 10 having a prescribed cross-sectional configuration. Then, the metal core material 10 except the joined sections is passed through a crosshead die 119a of an extruder so that the non-gloss surfaces of the metal core material 10 including said joined sections are covered with a synthetic resin to form a lip section 13. Thus, a metal molding with part of the longitudinal outer surface having a metallic gloss surface and with other non-glossy outer part covered with a synthetic resin can be obtained.

Description

Detailed Description of the Invention Technical Field The present invention relates to a metal molding in which a part of the outer surface in the longitudinal direction is crystallized with a metallic luster and the other outer surface is coated with a synthetic resin, and a method for manufacturing the same. It is something.

BACKGROUND ART Conventionally, when manufacturing a weather strip belt molding for an automobile as shown in FIG. After being bent into an abbreviated shape, it is introduced into an extrusion mold, and a synthetic resin such as soft polyvinyl chloride resin is coated with a part of the outer surface of the core material 1 remaining, or almost the entire surface is covered with synthetic resin. After being coated with resin, the synthetic resin is cut off and removed from the part that presents the metallic luster surface, thereby creating the lustrous surface 2 on a part of the outer surface and forming the lip portion 3 etc. on the other parts. Manufactured as a coated metal molding.

However, in this metal molding, a metal strip material whose entire outer surface is finished with a glossy surface, including the part covered by the lip part 3 other than the part presented as the metallic glossy surface 2, is used, and the metal core material 1 is Since the entire structure is made of expensive stainless steel, there is a lot of loss in machining and material costs, resulting in high costs.

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a metal molding that eliminates these wastes and can be made inexpensive, and a method for manufacturing the same.

That is, in the present invention, a metal molding is constructed by coating the outer surface of the metal core material other than the part that is presented as a metallic shiny surface with a synthetic resin while keeping the non-glossy surface.
In addition, a metal strip material whose metal molding has a glossy surface and a metal strip material whose non-glossy surface is joined to each other between the edges, the joints are removed, and the strip material is transformed into a metal core material with a predetermined cross-sectional shape. It has a bent shape and further coats at least the non-glossy surface part including the joint part with synthetic resin, so that part of the outer surface has a glossy surface and the other outer surface is coated with synthetic resin. It is manufactured as.

BEST MODE FOR CARRYING OUT THE INVENTION This will be explained based on the embodiment shown in FIGS. 2 to 4. In this embodiment, the core material 10 of the metal molding is formed from two strip materials 10a and 1Ob made of different materials. . As the strip material 10a, a stainless steel material with a metallic luster surface is used, and as the strip material 10b, an inexpensive galvanized steel plate or the like with a non-glossy surface is used. These loa and job are belt-shaped with a joint width sufficient to form one metal core material 10 by combining the two pieces (see Fig. 2C), and each of them should be wound around an uncoiler 100 and 401. It's coming out.

First, the strip materials 10a and 10b are connected to the uncoiler 10.
While drawing it out from 0°101, its longitudinal edges are joined. Welding is preferably applied to the connection (see Figure 82), and each strip material 10a, 1Ob is fed out with a pinch roll 102 and left and right presser rolls 103.10
For example, the TIG welding machine 105 can perform continuous welding and joining while controlling the abutment with the TIG welding machine 105. Then presser roll 1
0ft, +07. It can be rewound again by a recoiler 109 while being regulated by a pinch roll 108.

Next, the two joined strips 10' are fed out from the uncoiler 110, bent and formed into a predetermined cross-sectional shape, and pre-processed to coat and form the lip portion. As a pretreatment, a protective tape 11 is attached to the outer surface of the strip material 10a where the glossy surface is to be presented (see FIG. 2C). The protective tape 11 is an adhesive tape made of synthetic resin mainly made of polyvinyl chloride or polyester resin.
The lip material 10' is fed out from the uncoiler 110 and can be pasted between the rear pinch rolls 111 and 112 by the tape pasting device 113. Also, protective tape l'
After applying the strip material 10', adhesive 12 is applied to the other surface of the strip material 10' (see FIG. 2C). This adhesive 12 is used to bond a synthetic resin forming a lip portion (to be described later) to a metal core material, and can be applied by an adhesive applicator 114 disposed behind the tape applicator 113. After that, the strip material 10' is heated to a high frequency heating device 11.
5 to dry and solidify the adhesive 12, and then to the cooling device 1.
After being cooled to room temperature in step 16, it is sent to a roller group 117 of a cold roll forming machine. This roller group bends and forms the strip material lO', which has been in the form of a flat plate, into a metal core material 10 having a predetermined cross-sectional shape. The strip material 10' is bent and formed so that the surface has a three-shape shape. Moreover, in this cold roll forming machine, the strip material 10a.

Remove the welded joint part 10b and bend it (see Figure 2C). Thereafter, the previously applied adhesive 12 is activated by heating with a high frequency heating device 118, and the metal core material 10 is passed through the RAD die 119a to the cross of the extrusion molding machine 119, so that it is slightly bitten on both sides of the protective tape 11. A lip portion 13 is formed of a synthetic resin filled with the resin (see FIG. 2f). When molding this lip portion 13, the metal part made of the strip material 10b having a non-metallic glossy surface, including the joint portion of the strip materials 10a and 10b, is coated with synthetic resin, and the protective tape 11 is coated as necessary. The synthetic resin may also be applied to the metal parts of the strip material 10a having a metallic luster surface other than the parts coated with the resin. By providing a cut in the metal core material 10 at a portion of the dump portion 13 overlapping with the protective tape 11, the protective tape 11 can be peeled off when necessary, and a metallic luster surface can be presented.

In the metal molding thus obtained, the outer surface of the metal core material 10 is covered with a synthetic resin forming the lip portion 13, except for the part where the protective tape 11 is attached in the longitudinal direction. The exposed parts are made of a metal material that remains as a non-glossy surface. Therefore, since even the part that forms the lip part 13 with the synthetic resin coating is not made to have a glossy surface, it is possible to reduce labor by applying surface treatment only to the part that will present a glossy surface before finishing the glossy surface. It is. Further, the metal core material 10 is made of two metal materials 10a, 1
Since it is formed by joining 0b, even if stainless steel is used for the metal portion 10a that presents a shiny surface, ordinary inexpensive metal materials can be used for the other portion 10b. The joint portion of the metal core material 10 is covered with a synthetic resin that forms the lip portion 13.
Even if this molding is used for exterior purposes, rainwater and
Since it is not exposed to dust, etc., there is no risk of rusting. Also,
Even if the non-glossy surface of the metal portion 10b is not particularly processed or even if it is intentionally processed, if it is in a rough state such as a matte surface, it is difficult to firmly adhere the synthetic resin forming the lip portion I3. As a result, the peeling phenomenon of the lip portion 13 can be prevented from occurring.

Application example In the embodiment described above, there are two strips 10a.

10b were joined to form a metal core material 1O having a metal part with a glossy surface and a metal part with a non-glossy surface, but it is possible to apply a glossy surface finish to only the necessary parts using one strip material. In this manner, a metal core material having a portion having a glossy surface and a portion remaining as a non-glossy surface may be formed.

Further, when the metal core material 10 is formed by joining the two strip materials 10a and 10b, the joining can also be performed by bending each edge.

To explain this based on FIGS. 5 and 6, protective tape 21 and adhesive 22 are attached in advance to a strip material 20a having a glossy surface, and a strip material 20a with a non-glossy surface is attached in advance.
After applying adhesive to 0b (see Fig. a), these are fed out from the uncoiler 200201 and sent to the roller group 202, 202... of the cold roll forming machine, so that each edge is hooked in the opposite direction. The metal core material 20 with a predetermined cross-sectional shape is bent with a group of rollers 203, 203, etc. of the same cold roll forming machine. It can be bent and formed. A synthetic resin forming the lip portion 23 may be attached to the metal core material 20 by a crosshead gouger 204a of an extrusion molding machine 204 disposed at the rear of the cold roll molding machine.

At this time, similarly to the embodiment shown in FIGS. 2 to 4, the portions where the strips 20a and 20b are bent and joined are covered with a synthetic resin forming the lip portion 23 (see FIG. 5d).

In addition, in the two consecutive examples and application examples, weatherstrip belt moldings were manufactured, and in addition to this, body side moldings (see Figure 7), fender moldings (see Figure 8), etc. were manufactured. Can be widely applied.

Effects of the Invention As described above, according to the metal molding and the manufacturing method thereof according to the present invention, it is possible to reduce the cost by saving processing time and reducing the material cost, and to manufacture the molding at a low cost. I can do it.

[Brief explanation of the drawing]

FIG. 1 is an end view of a conventional metal molding;
2a-f are perspective views of each manufacturing process of the metal molding according to the present invention; FIGS. 3a, b, and 4 are explanatory views of the apparatus for manufacturing the metal molding shown in FIG. 5A to 5D are perspective views of each manufacturing process of a metal molding to which a method according to another embodiment is applied, FIG. 6 is an explanatory view of the apparatus for manufacturing the metal molding shown in FIG. 5, and FIGS. FIG. 8 is a perspective view showing a metal molding having a shape that can be manufactured according to the present invention. lO: metal core material, 10a: metal strip material with a glossy surface, 10b = metal strip material with a non-glossy surface, 1
3: Lip portion formed of synthetic resin. Patent applicant: Hashimoto Forming Industries Co., Ltd. Continued from page 1 0 Inventor: Ken Tsuchiya - Hashimoto Forming Industries Co., Ltd., 32-0 Fujii, Kamiyabe-cho, Totsuka-ku, Yokohama 0 Inventor: Hideho Higashida Kamiyabe, Totsuka-ku, Yokohama Inside Hashimoto Forming Industries Co., Ltd., 32-0 Fujii Inventor: Tadahiro Kono Inside Hashimoto Forming Industries Co., Ltd., 32-0 Fujii, Kamiyabe-cho, Totsuka-ku, Yokohama City

Claims (4)

[Claims] (1) A metal molding characterized in that the surface portion coated with a synthetic resin remains a non-glossy surface except for at least a portion of the outer surface of the metal core material which crystallizes as a metallic luster surface in the longitudinal direction. (2) A metal strip material with a metallic shiny surface and a metal strip material with a non-metallic shiny surface are joined to each other at their longitudinal edges, and the joined portions are removed and the strip material has a predetermined cross-sectional shape. By bending and molding the core material and coating the non-metallic shiny surface portion of the metal core material, including at least the joints, with a synthetic resin, a metallic shiny surface is crystallized on a part of the outer surface in the longitudinal direction, and other surfaces are formed. A method for manufacturing a metal molding characterized in that its outer surface is coated with a synthetic resin. (3) The method for manufacturing a metal molding according to claim 2, wherein the metal strip material having the metallic luster surface and the metal strip material having the non-metallic luster surface are welded and joined. (4) Manufacture of a metal molding according to claim 2, in which the metal strip material having the metallic luster surface and the metal strip material having the non-metallic luster surface are bent and joined between their edges. Method.